11.   Authorities previously acknowledged that they may never find the reason for the crash that killed Kennedy, his wife, and her sister.

12.   After years of denial, Asian authorities are acknowledging that they have a problem.

13.   Chinese authorities have acknowledged the problems and have vowed to overcome them.

14.   Even under ideal conditions, Peruvian authorities acknowledge that putting a stop to looting would be a monumental task.

15.   Federal authorities acknowledged that a small amount of explosives had been stored in the Murrah building but denied that they contributed to the destruction.

16.   Federal authorities acknowledged Tuesday that that was a possibility, but said it would change nothing in their search.

17.   For all the intensive tests, investigations and hypotheses, however, the authorities acknowledged that they still had no idea where the stuff came from.

18.   He is believed to have left Rome in early July, and American authorities acknowledge that the trail has gone cold.

19.   In Poland, the number and severity of accidents have become a national concern, although the authorities acknowledge that little is being done about it.

20.   In the agreement, the housing authority acknowledged that it had updated its waiting lists by purging the names of those who failed to respond to letters in English.